Vampires and zombies on Halloween are over, so what's next?

​First it was ninjas, then pirates that were the obsession of hip kids on Halloween (and ok, pretty much any time). Vampires and zombies were the creepy crawly obsessions of the last few years, but Twilight ruined vampires and nerds ruined zombies. So what's the cresting wave of cool for this year's Halloween wear?

What monster will 12-year-old girls next become obsessed with? What creature will hipster-nerds dress as en masse for their drinking excursions? We think one of these ideas might be the next big obsession among the spooky-hearted.